[A6] Oscillator flaws

[matrixsynth]

Wow.  Nice bug.  Confirmed on my end.

-matrix
http://www.matrixsynth.com/blog
____________________________
----- Original Message ----- 
From: "Siro Mateos" <siro_mateos at hotmail.com>
To: <a6 at code404.com>
Sent: Sunday, October 09, 2005 11:18 AM
Subject: [A6] Oscillator flaws


>
> Hi all!
>
> I've discovered what seems a hardware flaw in my A6 oscillators. I'd like 
> to hear what
>
> you experience when reproducing this really crankie bug:
>
> On the oscillator of your choice, set up both square and triangle outputs 
> on (saw and sine
>
> off), pulse width above 80%, no PWM, and turn sub-oscillator mix to the 
> maximum. Now
>
> start playing while you increase square output level from it's 50% default 
> level to the max.
>
> Well, here it is... on my unit this setup causes a suddent pitch fall when 
> i reach the
>
> maximum square output level, and this flaw is different in magnitude from 
> voice to voice.
>
> It turns out that only 4 voices handle this situation flawesly, in fact 
> only one voice (no. 2)
>
> stays perfectly in tune... out of 16 voices!!. When I set rotary 
> assignement of voices, my
>
> A6 plays sort of an arpeggio when switching from voice to voice, and if I 
> try unison all
>
> voices, then emerges a really beautiful and dense 'kind of major' chord 
> from only one
>
> keyboard note. Finally, when I try the other oscillator, i find pretty the 
> same flaw
>
> magnitude on the same voices!
>
> I've been unable to find more combinations between waveforms outputs in 
> which the flaw
>
> manifests. If I turn on sine, or saw, or narrow down pulse width then it 
> sweeps to normal
>
> pitch.
>
> Please, post some comments about this.
>
> Thanks!
>
>
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